APA (7th ed.) Citation

Porter, D., & Prince, D. (2003). Frommer's portable Puerto Rico (2nd ed.). John Wiley.

Chicago Style (17th ed.) Citation

Porter, Darwin, and Danforth Prince. Frommer's Portable Puerto Rico. 2nd ed. New York: John Wiley, 2003.

MLA (9th ed.) Citation

Porter, Darwin, and Danforth Prince. Frommer's Portable Puerto Rico. 2nd ed. John Wiley, 2003.